/* 51huatan.lol light */
:root{--bg:#f4f6f2;--surface:#ffffff;--text:#1b1f18;--muted:#2f362c;--accent:#5f9f2e;--accent-2:#81d742;--line:#e2e8dc;--radius:20px;--max:1180px;--shadow:0 8px 28px rgba(27,31,24,.06);--font:system-ui, -apple-system, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;color-scheme:light}
*,*::before,*::after{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.7;font-size:16px;min-height:100vh}
img{max-width:100%;height:auto;display:block}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}
.wrap{width:min(100% - 32px,var(--max));margin-inline:auto}
.site-header{position:sticky;top:0;z-index:50;background:var(--surface);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 0;min-height:64px}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);text-decoration:none}.brand:hover{text-decoration:none}.brand img{height:28px;width:auto}.brand-text{font-weight:700;font-size:1.125rem}
.nav{display:flex;flex-wrap:wrap;gap:6px 14px;align-items:center}.nav a{color:var(--muted);font-size:.92rem;padding:6px 2px;border-bottom:2px solid transparent}
.nav a:hover,.nav a[aria-current=page]{color:var(--text);border-bottom-color:var(--accent-2);text-decoration:none}
.nav-toggle{display:none;border:1px solid var(--line);background:var(--surface);border-radius:12px;padding:8px 12px;cursor:pointer;color:var(--text)}
.hero{padding:36px 0 12px}.hero-panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;display:block}
.hero-copy{padding:36px 32px}.hero-visual{background:linear-gradient(160deg,#e8f6d8,#f7fbf2 45%,#dff3c8);display:flex;align-items:center;justify-content:center;padding:20px;min-height:220px}
.hero-visual img{width:100%;max-height:240px;object-fit:cover;border-radius:16px;border:1px solid var(--line)}
.eyebrow{display:inline-flex;font-size:.82rem;color:#3d6b1c;font-weight:600;background:rgba(95,159,46,.1);padding:4px 10px;border-radius:999px;margin-bottom:14px}
h1{font-size:1.75rem;line-height:1.35;margin:0 0 14px;font-weight:750;overflow-wrap:anywhere}
.lead{color:var(--muted);font-size:1.02rem;margin:0 0 18px;max-width:52ch}
.btn-row{display:flex;flex-wrap:wrap;gap:10px}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 18px;border-radius:999px;font-weight:600;font-size:.95rem;border:1px solid transparent;text-decoration:none!important}
.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{filter:brightness(1.05)}.btn-ghost{background:#fff;color:var(--text);border-color:var(--line)}
.section{padding:28px 0}.section-head{display:flex;align-items:end;justify-content:space-between;gap:12px;margin-bottom:16px}.section-head h2{margin:0;font-size:1.25rem}.section-head p{margin:0;color:var(--muted);font-size:.92rem}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:10px;transition:transform .15s ease,box-shadow .15s ease}
.card:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(27,31,24,.09)}
.card .tag{font-size:.75rem;font-weight:700;color:var(--accent)}.card h3{margin:0;font-size:1.05rem;line-height:1.4;overflow-wrap:anywhere}.card h3 a{color:inherit;text-decoration:none}.card h3 a:hover{color:var(--accent)}.card p{margin:0;color:var(--muted);font-size:.92rem;flex:1}.card .more{font-size:.88rem;font-weight:600;color:var(--accent)}
.tips{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.tip{background:var(--surface);border-radius:var(--radius);border:1px solid var(--line);padding:18px}.tip strong{display:block;margin-bottom:6px}.tip p{margin:0;color:var(--muted);font-size:.92rem}
.prose{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:28px 28px 20px;box-shadow:var(--shadow)}
.prose h2{font-size:1.2rem;margin:1.6em 0 .6em}.prose h2:first-child{margin-top:0}.prose h3{font-size:1.05rem;margin:1.3em 0 .5em}.prose p,.prose li{color:#2a3127}.prose ul,.prose ol{padding-left:1.2em}
.prose table{width:100%;border-collapse:collapse;font-size:.92rem;margin:12px 0 18px}.prose th,.prose td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}.prose th{background:#f2f7ec}
.note{background:#f3f9ea;border:1px solid #d5e8bf;border-radius:14px;padding:12px 14px;color:#3d4a35;font-size:.92rem;margin:14px 0}
.breadcrumb{font-size:.85rem;color:var(--muted);margin:18px 0 10px}.breadcrumb a{color:var(--muted)}
.faq details{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:12px 16px;margin-bottom:10px}.faq summary{cursor:pointer;font-weight:600}.faq details p{color:var(--muted);margin:8px 0 4px}
.site-footer{margin-top:40px;border-top:1px solid var(--line);background:#fff;padding:28px 0 100px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:20px}.footer-grid h2{font-size:.95rem;margin:0 0 10px}.footer-grid p,.footer-grid a{color:var(--muted);font-size:.9rem}.footer-grid ul{list-style:none;padding:0;margin:0}.footer-grid li{margin:0 0 8px}.footer-meta{margin-top:18px;color:var(--muted);font-size:.82rem}
.layout-2{display:grid;grid-template-columns:1fr 280px;gap:18px;align-items:start}
.side{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px;position:sticky;top:84px}.side h2{font-size:.95rem;margin:0 0 10px}.side a{display:block;padding:6px 0;color:var(--muted);font-size:.9rem}.side a:hover{color:var(--accent)}
@media(max-width:960px){.hero-panel{grid-template-columns:1fr}.hero-visual{order:-1;min-height:160px}.card-grid,.tips{grid-template-columns:1fr 1fr}.layout-2{grid-template-columns:1fr}.side{position:static}.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:720px){.nav-toggle{display:inline-flex}.nav{display:none;width:100%;flex-direction:column;align-items:stretch;padding-bottom:10px}.nav.open{display:flex}.header-inner{flex-wrap:wrap}.card-grid,.tips,.footer-grid{grid-template-columns:1fr}.hero-copy{padding:24px 18px}.prose{padding:20px 16px 14px}}